English language pronunciation practice with minimal pairs
http://www.teachingenglish.org.uk/sites/teacheng/files/TEphonemic_GreyBlue2_0.swf
Homophones, Homonyms, Homographs...
Cuaderno de Inglés (Blog of Mansión del Inglés with a collection of links about pronunciation)
ESL Tower (exercises online)
ESL Galaxy (Pronunciation & Intonation Teaching Materials)
English for Kids: ESL Phonics & Phonetics worksheets
I take it you already know (Poem about English language pronunciation)
Jolly Phonics: http://jollylearning.co.uk/gallery/